TB28F400BVT80 Intel, TB28F400BVT80 Datasheet - Page 15
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TB28F400BVT80
Manufacturer Part Number
TB28F400BVT80
Description
Manufacturer
Intel
Datasheet
1.TB28F400BVT80.pdf
(57 pages)
Specifications of TB28F400BVT80
Density
4Mb
Access Time (max)
80ns
Interface Type
Parallel
Boot Type
Top
Address Bus
19/18Bit
Operating Supply Voltage (typ)
3.3/5V
Operating Temp Range
-40C to 85C
Package Type
SOP
Sync/async
Asynchronous
Operating Temperature Classification
Industrial
Operating Supply Voltage (min)
3/4.5V
Operating Supply Voltage (max)
3.6/5.5V
Word Size
8/16Bit
Number Of Words
512K/256K
Supply Current
70mA
Mounting
Surface Mount
Pin Count
44
Lead Free Status / Rohs Status
Not Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TB28F400BVT80
Manufacturer:
INTEL
Quantity:
5 000
Part Number:
TB28F400BVT80
Manufacturer:
INTEL
Quantity:
20 000
3.0
Flash memory combines EPROM functionality with
in-circuit electrical write and erase. The boot block
flash family utilizes a Command User Interface
(CUI) and automated algorithms to simplify write
and erase operations. The CUI allows for 100%
TTL-level control inputs, fixed power supplies
during erasure and programming, and maximum
EPROM compatibility.
When V
execute the following commands: Read Array,
Read Status Register, Clear Status Register and
intelligent identifier mode. The device provides
standard EPROM read, standby and output disable
operations. Manufacturer identification and device
identification data can be accessed through the CUI
or through the standard EPROM A
access (V
The same EPROM read, standby and output
disable functions are available when 5 V or 12 V is
applied to the V
V
functions associated with altering memory contents:
Program and Erase, Intelligent Identifier Read, and
Read Status are accessed via the CUI.
The internal Write State Machine (WSM) completely
automates program and erase, beginning operation
signaled by the CUI and reporting status through
the status register. The CUI handles the WE#
interface to the data and address latches, as well
as system status requests during WSM operation.
3.1
Flash memory reads, erases and writes in-system
via the local CPU. All bus cycles to or from the flash
memory conform to standard microprocessor bus
cycles. These bus operations are summarized in
Tables 3 and 4.
PP
SEE NEW DESIGN RECOMMENDATIONS
allows write and erase of the device. All
PRODUCT FAMILY PRINCIPLES
OF OPERATION
PP
Bus Operations
ID
< V
) for PROM programming equipment.
PPLK
PP
, the device will only successfully
pin. In addition, 5 V or 12 V on
9
high voltage
4-MBIT SmartVoltage BOOT BLOCK FAMILY
3.2
3.2.1
When RP# transitions from V
device will be in the read array mode and will
respond to the read control inputs (CE#, address
inputs, and OE#) without any commands being
written to the CUI.
When the device is in the read array mode, five
control signals must be controlled to obtain data at
the outputs.
In addition, the address of the desired location must
be applied to the address pins. Refer to Figures 15
and 16 for the exact sequence and timing of these
signals.
If the device is not in read array mode, as would be
the case after a program or erase operation, the
Read Mode command (FFH) must be written to the
CUI before reads can take place.
During system design, consideration should be
taken to ensure address and control inputs meet
required input slew rates of <10 ns as defined in
Figures 12 and 13.
RP# must be logic high (V
WE# must be logic high (V
BYTE# must be logic high or logic low
CE# must be logic low (V
OE must be logic low (V
Read Operations
READ ARRAY
IL
IL
)
IH
IH
)
IL
)
)
(reset) to V
IH
, the
15